Mercy
Background
Mercy is a resident of New England. Her father is William and her mother is Katherine. Mercy's siblings are Thomasin, Samuel, Caleb and Jonas.
During the events of The Witch (2015) played by Ellie Grainger
William is in front of a town council as Thomasin, Katherine, Caleb, Mercy, Jonas and Samuel are nearby and a group of Settlers watch. William questions the motives of the villagers in leaving England. The Governor tells William to be silent and as William continues, Old Slater tells William that he is the one being judged, not them. William calls them false Christians and the Governor banishes William and his family from the village. As they are leaving the village they pass Wampanoag Men and pass three Militia Men who close the village doors to them. William then takes his family on a wagon out into the forest. The family arrives at a clearing and gives a prayer of thanks. Months later, Samuel disappears while Thomasin is watching him. Mercy and Jonas run behind Black Phillip singing a song about him being the king of all. Thomasin yells at them to help in chores, but they ignore her. William and Caleb return home and William throws Black Phillip into the goat pen. Katherine yells at William for leaving with Caleb and Thomasin for not watching Mercy and Jonas. While cleaning clothes and fetching water, Thomasin and Caleb hear a noise and they see Mercy hiding. Mercy declares herself the Witch of the Wood and tells Thomasin that Thomasin has to do all the work, because Katherine hates her. Mercy blames Thomasin for Samuel being taken away and Caleb tells her it was a wolf that took Samuel. Mercy then tells them it was a witch which she has seen. Thomasin tells Mercy it was her and she is the witch and threatens to make Mercy disappear. After Caleb returns home, Mercy and Jonas talk to Black Phillip and tell Thomasin that he says she is the one who cursed Caleb. They then accuse Thomasin of being a witch. As Thomasin is milking Flora (The Witch)|Flora, only blood spurts out. In the house, Caleb suddenly starts to scream and starts babbling about cutting off The Witch's head. He regurgitates a bloody apple and when Katherine says Caleb is witched, Mercy and Jonas accuse Thomasin of being a witch and turning Flora's milk into blood. William orders Thomasin to give her word that she loves God. As William orders everyone to pray over Caleb, Mercy and Jonas say they have forgotten their prayer words. They start to scream and Caleb starts babbling and professes his sins to Jesus. He asks God to take him to Heaven and suddenly dies. After Thomasin accuses them of selling their souls to Satan, William grabs Thomasin, Mercy and Jonas and throws them in the goat shed. During the night, something breaks into the goat pen and Mercy and Jonas find The Witch suckling from Flora. In the morning, William wakes up and finds the goat shed destroyed, Mercy and Jonas gone, Flora dead and Thomasin covered in blood.